PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-15:42:50
G10     261.8          34.3                7.4 +/-    1.54      11.9 +/-    1.54  0.280 / 0.190
G13     45.0           23.0                5.5 +/-    2.65      11.3 +/-    2.65  0.170 / 0.250
G15     63.8           50.9                6.4 +/-    0.91       8.0 +/-    0.91  0.060 / 0.070
G16     287.9          12.5                7.6 +/-    2.26      20.1 +/-    2.26  0.050 / 0.060
G18     293.9          63.9                7.2 +/-    0.57       7.9 +/-    0.57  0.250 / 0.340
G20     49.5           41.2                4.5 +/-    0.79       6.4 +/-    0.79  0.170 / 0.270
G21     7.8            71.4                5.8 +/-    0.82       6.1 +/-    0.82  0.160 / 0.410
G24     125.4          11.0               -5.5 +/-   34.47     -15.1 +/-   34.47  0.210 / 0.460
G27     320.0          16.1                6.0 +/-    2.52      14.4 +/-    2.52  0.060 / 0.080
G29     165.5          32.4                7.2 +/-    0.94      12.1 +/-    0.94  0.040 / 0.080